I've been thinking a lot about quality content signals since the panda update. One thing I read recently dealt with having multiple pages on a site targeting a similar keyword.
While we didnt really do this kind of thing for high traffic keywords, we did offer yearly predictions on the same topic. For example, "2011 widget predictions" while also having different versions dating back to 2006. All of this content was extremely unique but the titles and h1 tags very similar (only the year was changed.)
My question is: should we keep the older articles on the site? They are not really useful except for visitors wanting to check how accurate we have been in the past. Should we noindex these pages, or remove them and redirect them?
Some have links pointing to them but for the most part we wrote them all under a url of /widget-predictions.shmtl updated that page with the current years versions and then renamed the old /widget-predictions-2010.shmtl
